compat/mingw.h

   1 #include <winsock2.h>
   2 #include <ws2tcpip.h>
   3
   4 /*
   5  * things that are not available in header files
   6  */
   7
   8 typedef int pid_t;
   9 typedef int uid_t;
  10 typedef int socklen_t;
  11 #define hstrerror strerror
  12
  13 #define S_IFLNK    0120000 /* Symbolic link */
  14 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
  15 #define S_ISSOCK(x) 0
  16
  17 #define S_IRGRP 0
  18 #define S_IWGRP 0
  19 #define S_IXGRP 0
  20 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
  21 #define S_IROTH 0
  22 #define S_IWOTH 0
  23 #define S_IXOTH 0
  24 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
  25
  26 #define S_ISUID 0004000
  27 #define S_ISGID 0002000
  28 #define S_ISVTX 0001000
  29
  30 #define WIFEXITED(x) 1
  31 #define WIFSIGNALED(x) 0
  32 #define WEXITSTATUS(x) ((x) & 0xff)
  33 #define WTERMSIG(x) SIGTERM
  34
  35 #ifndef EWOULDBLOCK
  36 #define EWOULDBLOCK EAGAIN
  37 #endif
  38 #define SHUT_WR SD_SEND
  39
  40 #define SIGHUP 1
  41 #define SIGQUIT 3
  42 #define SIGKILL 9
  43 #define SIGPIPE 13
  44 #define SIGALRM 14
  45 #define SIGCHLD 17
  46
  47 #define F_GETFD 1
  48 #define F_SETFD 2
  49 #define FD_CLOEXEC 0x1
  50
  51 #ifndef EAFNOSUPPORT
  52 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  53 #endif
  54 #ifndef ECONNABORTED
  55 #define ECONNABORTED WSAECONNABORTED
  56 #endif
  57
  58 struct passwd {
  59         char *pw_name;
  60         char *pw_gecos;
  61         char *pw_dir;
  62 };
  63
  64 typedef void (__cdecl *sig_handler_t)(int);
  65 struct sigaction {
  66         sig_handler_t sa_handler;
  67         unsigned sa_flags;
  68 };
  69 #define sigemptyset(x) (void)0
  70 #define SA_RESTART 0
  71
  72 struct itimerval {
  73         struct timeval it_value, it_interval;
  74 };
  75 #define ITIMER_REAL 0
  76
  77 /*
  78  * sanitize preprocessor namespace polluted by Windows headers defining
  79  * macros which collide with git local versions
  80  */
  81 #undef HELP_COMMAND /* from winuser.h */
  82
  83 /*
  84  * trivial stubs
  85  */
  86
  87 static inline int fchmod(int fildes, mode_t mode)
  88 { errno = ENOSYS; return -1; }
  89 static inline pid_t fork(void)
  90 { errno = ENOSYS; return -1; }
  91 static inline unsigned int alarm(unsigned int seconds)
  92 { return 0; }
  93 static inline int fsync(int fd)
  94 { return _commit(fd); }
  95 static inline pid_t getppid(void)
  96 { return 1; }
  97 static inline void sync(void)
  98 {}
  99 static inline uid_t getuid(void)
 100 { return 1; }
 101 static inline struct passwd *getpwnam(const char *name)
 102 { return NULL; }
 103 static inline int fcntl(int fd, int cmd, ...)
 104 {
 105         if (cmd == F_GETFD || cmd == F_SETFD)
 106                 return 0;
 107         errno = EINVAL;
 108         return -1;
 109 }
 110 /* bash cannot reliably detect negative return codes as failure */
 111 #define exit(code) exit((code) & 0xff)
 112
 113 /*
 114  * simple adaptors
 115  */
 116
 117 int mingw_mkdir(const char *path, int mode);
 118 #define mkdir mingw_mkdir
 119
 120 #define WNOHANG 1
 121 pid_t waitpid(pid_t pid, int *status, int options);
 122
 123 #define kill mingw_kill
 124 int mingw_kill(pid_t pid, int sig);
 125
 126 #ifndef NO_OPENSSL
 127 #include <openssl/ssl.h>
 128 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 129 {
 130         return SSL_set_fd(ssl, _get_osfhandle(fd));
 131 }
 132 #define SSL_set_fd mingw_SSL_set_fd
 133
 134 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 135 {
 136         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 137 }
 138 #define SSL_set_rfd mingw_SSL_set_rfd
 139
 140 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 141 {
 142         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 143 }
 144 #define SSL_set_wfd mingw_SSL_set_wfd
 145 #endif
 146
 147 #undef symlink_with_type
 148 #define symlink_with_type(a,b,c) mingw_symlink((a),(b),(c))
 149 #define symlink(a,b) mingw_symlink((a),(b),GIT_TARGET_UNKNOWN)
 150
 151 /*
 152  * implementations of missing functions
 153  */
 154
 155 int pipe(int filedes[2]);
 156 unsigned int sleep (unsigned int seconds);
 157 int mkstemp(char *template);
 158 int gettimeofday(struct timeval *tv, void *tz);
 159 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 160 struct tm *localtime_r(const time_t *timep, struct tm *result);
 161 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 162 struct passwd *getpwuid(uid_t uid);
 163 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 164 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 165 int link(const char *oldpath, const char *newpath);
 166
 167 int mingw_symlink(const char *oldpath, const char *newpath, enum git_target_type targettype);
 168 int readlink(const char *path, char *buf, size_t bufsiz);
 169
 170 /*
 171  * replacements of existing functions
 172  */
 173
 174 int mingw_unlink(const char *pathname);
 175 #define unlink mingw_unlink
 176
 177 int mingw_rmdir(const char *path);
 178 #define rmdir mingw_rmdir
 179
 180 int mingw_open (const char *filename, int oflags, ...);
 181 #define open mingw_open
 182
 183 int mingw_fgetc(FILE *stream);
 184 #define fgetc mingw_fgetc
 185
 186 FILE *mingw_fopen (const char *filename, const char *otype);
 187 #define fopen mingw_fopen
 188
 189 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 190 #define freopen mingw_freopen
 191
 192 int mingw_fflush(FILE *stream);
 193 #define fflush mingw_fflush
 194
 195 int mingw_access(const char *filename, int mode);
 196 #undef access
 197 #define access mingw_access
 198
 199 int mingw_chdir(const char *dirname);
 200 #define chdir mingw_chdir
 201
 202 int mingw_chmod(const char *filename, int mode);
 203 #define chmod mingw_chmod
 204
 205 char *mingw_mktemp(char *template);
 206 #define mktemp mingw_mktemp
 207
 208 char *mingw_getcwd(char *pointer, int len);
 209 #define getcwd mingw_getcwd
 210
 211 char *mingw_getenv(const char *name);
 212 #define getenv mingw_getenv
 213 int mingw_putenv(const char *namevalue);
 214 #define putenv mingw_putenv
 215 #define unsetenv mingw_putenv
 216
 217 int mingw_gethostname(char *host, int namelen);
 218 #define gethostname mingw_gethostname
 219
 220 struct hostent *mingw_gethostbyname(const char *host);
 221 #define gethostbyname mingw_gethostbyname
 222
 223 void mingw_freeaddrinfo(struct addrinfo *res);
 224 #define freeaddrinfo mingw_freeaddrinfo
 225
 226 int mingw_getaddrinfo(const char *node, const char *service,
 227                       const struct addrinfo *hints, struct addrinfo **res);
 228 #define getaddrinfo mingw_getaddrinfo
 229
 230 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 231                       char *host, DWORD hostlen, char *serv, DWORD servlen,
 232                       int flags);
 233 #define getnameinfo mingw_getnameinfo
 234
 235 int mingw_socket(int domain, int type, int protocol);
 236 #define socket mingw_socket
 237
 238 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 239 #define connect mingw_connect
 240
 241 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 242 #define bind mingw_bind
 243
 244 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 245 #define setsockopt mingw_setsockopt
 246
 247 int mingw_shutdown(int sockfd, int how);
 248 #define shutdown mingw_shutdown
 249
 250 int mingw_listen(int sockfd, int backlog);
 251 #define listen mingw_listen
 252
 253 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 254 #define accept mingw_accept
 255
 256 int mingw_rename(const char*, const char*);
 257 #define rename mingw_rename
 258
 259 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 260 int mingw_getpagesize(void);
 261 #define getpagesize mingw_getpagesize
 262 #endif
 263
 264 struct rlimit {
 265         unsigned int rlim_cur;
 266 };
 267 #define RLIMIT_NOFILE 0
 268
 269 static inline int getrlimit(int resource, struct rlimit *rlp)
 270 {
 271         if (resource != RLIMIT_NOFILE) {
 272                 errno = EINVAL;
 273                 return -1;
 274         }
 275
 276         rlp->rlim_cur = 2048;
 277         return 0;
 278 }
 279
 280 /*
 281  * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
 282  * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
 283  */
 284 static inline long long filetime_to_hnsec(const FILETIME *ft)
 285 {
 286         long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
 287         /* Windows to Unix Epoch conversion */
 288         return winTime - 116444736000000000LL;
 289 }
 290
 291 static inline time_t filetime_to_time_t(const FILETIME *ft)
 292 {
 293         return (time_t)(filetime_to_hnsec(ft) / 10000000);
 294 }
 295
 296 /*
 297  * Use mingw specific stat()/lstat()/fstat() implementations on Windows.
 298  */
 299 #define off_t off64_t
 300 #define lseek _lseeki64
 301
 302 /* use struct stat with 64 bit st_size */
 303 #ifdef stat
 304 #undef stat
 305 #endif
 306 #define stat _stati64
 307 int mingw_lstat(const char *file_name, struct stat *buf);
 308 int mingw_stat(const char *file_name, struct stat *buf);
 309 int mingw_fstat(int fd, struct stat *buf);
 310 #ifdef fstat
 311 #undef fstat
 312 #endif
 313 #define fstat mingw_fstat
 314 #ifdef lstat
 315 #undef lstat
 316 #endif
 317 extern int (*lstat)(const char *file_name, struct stat *buf);
 318
 319 #ifndef _stati64
 320 # define _stati64(x,y) mingw_stat(x,y)
 321 #elif defined (_USE_32BIT_TIME_T)
 322 # define _stat32i64(x,y) mingw_stat(x,y)
 323 #else
 324 # define _stat64(x,y) mingw_stat(x,y)
 325 #endif
 326
 327 int mingw_utime(const char *file_name, const struct utimbuf *times);
 328 #define utime mingw_utime
 329
 330 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 331                      const char *dir,
 332                      int fhin, int fhout, int fherr);
 333 int mingw_execvp(const char *cmd, char *const *argv);
 334 #define execvp mingw_execvp
 335 int mingw_execv(const char *cmd, char *const *argv);
 336 #define execv mingw_execv
 337
 338 static inline unsigned int git_ntohl(unsigned int x)
 339 { return (unsigned int)ntohl(x); }
 340 #define ntohl git_ntohl
 341
 342 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 343 #define signal mingw_signal
 344
 345 int mingw_raise(int sig);
 346 #define raise mingw_raise
 347
 348 /*
 349  * ANSI emulation wrappers
 350  */
 351
 352 void winansi_init(void);
 353 HANDLE winansi_get_osfhandle(int fd);
 354
 355 /*
 356  * git specific compatibility
 357  */
 358
 359 #define has_dos_drive_prefix(path) (isalpha(*(path)) && (path)[1] == ':')
 360 #define is_dir_sep(c) ((c) == '/' || (c) == '\\')
 361 static inline char *mingw_find_last_dir_sep(const char *path)
 362 {
 363         char *ret = NULL;
 364         for (; *path; ++path)
 365                 if (is_dir_sep(*path))
 366                         ret = (char *)path;
 367         return ret;
 368 }
 369 #define find_last_dir_sep mingw_find_last_dir_sep
 370 int mingw_offset_1st_component(const char *path);
 371 #define offset_1st_component mingw_offset_1st_component
 372 #define PATH_SEP ';'
 373 #define PRIuMAX "I64u"
 374 #define PRId64 "I64d"
 375
 376 void mingw_open_html(const char *path);
 377 #define open_html mingw_open_html
 378
 379 void mingw_mark_as_git_dir(const char *dir);
 380 #define mark_as_git_dir mingw_mark_as_git_dir
 381
 382 char *mingw_resolve_symlink(char *p, size_t s);
 383 #define resolve_symlink mingw_resolve_symlink
 384
 385 /**
 386  * Max length of long paths (exceeding MAX_PATH). The actual maximum supported
 387  * by NTFS is 32,767 (* sizeof(wchar_t)), but we choose an arbitrary smaller
 388  * value to limit required stack memory.
 389  */
 390 #define MAX_LONG_PATH 4096
 391
 392 /**
 393  * Handles paths that would exceed the MAX_PATH limit of Windows Unicode APIs.
 394  *
 395  * With expand == false, the function checks for over-long paths and fails
 396  * with ENAMETOOLONG. The path parameter is not modified, except if cwd + path
 397  * exceeds max_path, but the resulting absolute path doesn't (e.g. due to
 398  * eliminating '..' components). The path parameter must point to a buffer
 399  * of max_path wide characters.
 400  *
 401  * With expand == true, an over-long path is automatically converted in place
 402  * to an absolute path prefixed with '\\?\', and the new length is returned.
 403  * The path parameter must point to a buffer of MAX_LONG_PATH wide characters.
 404  *
 405  * Parameters:
 406  * path: path to check and / or convert
 407  * len: size of path on input (number of wide chars without \0)
 408  * max_path: max short path length to check (usually MAX_PATH = 260, but just
 409  * 248 for CreateDirectoryW)
 410  * expand: false to only check the length, true to expand the path to a
 411  * '\\?\'-prefixed absolute path
 412  *
 413  * Return:
 414  * length of the resulting path, or -1 on failure
 415  *
 416  * Errors:
 417  * ENAMETOOLONG if path is too long
 418  */
 419 int handle_long_path(wchar_t *path, int len, int max_path, int expand);
 420
 421 /**
 422  * Converts UTF-8 encoded string to UTF-16LE.
 423  *
 424  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 425  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 426  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 427  * Unicode) are converted to hex-code.
 428  *
 429  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 430  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 431  *
 432  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 433  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 434  *
 435  * The maximum space is needed only if the entire input string consists of
 436  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 437  *
 438  *               |                   | UTF-8 | UTF-16 |
 439  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 440  * --------------+-------------------+-------+--------+-------
 441  * 000000-00007f | 0-7f              |   1   |   1    |  1
 442  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 443  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 444  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 445  * invalid       | 80-9f             |   1   |  2 (b) |  2
 446  * invalid       | a0-ff             |   1   |   1    |  1
 447  *
 448  * (a) encoded as UTF-16 surrogate pair
 449  * (b) encoded as two hex digits
 450  *
 451  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 452  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 453  * encodes as only 4 UTF-8 bytes.
 454  *
 455  * Parameters:
 456  * wcs: wide char target buffer
 457  * utf: string to convert
 458  * wcslen: size of target buffer (in wchar_t's)
 459  * utflen: size of string to convert, or -1 if 0-terminated
 460  *
 461  * Returns:
 462  * length of converted string (_wcslen(wcs)), or -1 on failure
 463  *
 464  * Errors:
 465  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 466  * ERANGE: the output buffer is too small
 467  */
 468 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 469
 470 /**
 471  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 472  */
 473 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 474 {
 475         return xutftowcsn(wcs, utf, wcslen, -1);
 476 }
 477
 478 /**
 479  * Simplified file system specific wrapper of xutftowcsn and handle_long_path.
 480  * Converts ERANGE to ENAMETOOLONG. If expand is true, wcs must be at least
 481  * MAX_LONG_PATH wide chars (see handle_long_path).
 482  */
 483 static inline int xutftowcs_path_ex(wchar_t *wcs, const char *utf,
 484                 size_t wcslen, int utflen, int max_path, int expand)
 485 {
 486         int result = xutftowcsn(wcs, utf, wcslen, utflen);
 487         if (result < 0 && errno == ERANGE)
 488                 errno = ENAMETOOLONG;
 489         if (result >= 0)
 490                 result = handle_long_path(wcs, result, max_path, expand);
 491         return result;
 492 }
 493
 494 /**
 495  * Simplified file system specific variant of xutftowcsn, assumes output
 496  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 497  * fails with ENAMETOOLONG if input string is too long. Typically used for
 498  * Windows APIs that don't support long paths, e.g. SetCurrentDirectory,
 499  * LoadLibrary, CreateProcess...
 500  */
 501 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 502 {
 503         return xutftowcs_path_ex(wcs, utf, MAX_PATH, -1, MAX_PATH, 0);
 504 }
 505
 506 /* need to re-declare that here as mingw.h is included before cache.h */
 507 extern int core_long_paths;
 508
 509 /**
 510  * Simplified file system specific variant of xutftowcsn for Windows APIs
 511  * that support long paths via '\\?\'-prefix, assumes output buffer size is
 512  * MAX_LONG_PATH wide chars, fails with ENAMETOOLONG if input string is too
 513  * long. The 'core.longpaths' git-config option controls whether the path
 514  * is only checked or expanded to a long path.
 515  */
 516 static inline int xutftowcs_long_path(wchar_t *wcs, const char *utf)
 517 {
 518         return xutftowcs_path_ex(wcs, utf, MAX_LONG_PATH, -1, MAX_PATH,
 519                         core_long_paths);
 520 }
 521
 522 /**
 523  * Converts UTF-16LE encoded string to UTF-8.
 524  *
 525  * Maximum space requirement for the target buffer is three UTF-8 chars per
 526  * wide char ((_wcslen(wcs) * 3) + 1).
 527  *
 528  * The maximum space is needed only if the entire input string consists of
 529  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 530  * modulo surrogate pairs), as per the following table:
 531  *
 532  *               |                       | UTF-16 | UTF-8 |
 533  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 534  * --------------+-----------------------+--------+-------+-------
 535  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 536  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 537  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 538  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 539  *
 540  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 541  *
 542  * Parameters:
 543  * utf: target buffer
 544  * wcs: wide string to convert
 545  * utflen: size of target buffer
 546  *
 547  * Returns:
 548  * length of converted string, or -1 on failure
 549  *
 550  * Errors:
 551  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 552  * ERANGE: the output buffer is too small
 553  */
 554 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 555
 556 /*
 557  * A critical section used in the implementation of the spawn
 558  * functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
 559  * the replacement main() macro below.
 560  */
 561 extern CRITICAL_SECTION pinfo_cs;
 562
 563 /*
 564  * A replacement of main() that adds win32 specific initialization.
 565  */
 566
 567 void mingw_startup();
 568 #define main(c,v) dummy_decl_mingw_main(); \
 569 static int mingw_main(c,v); \
 570 int main(c,v) \
 571 { \
 572         mingw_startup(); \
 573         return mingw_main(__argc, __argv); \
 574 } \
 575 static int mingw_main(c,v)
 576
 577 /*
 578  * Used by Pthread API implementation for Windows
 579  */
 580 extern int err_win_to_posix(DWORD winerr);
 581
 582 extern const char *get_windows_home_directory();
 583 #define get_home_directory() get_windows_home_directory()